net.sf.saxon.expr
Interface LastPositionFinder

All Superinterfaces:
SequenceIterator
All Known Implementing Classes:
ArrayIterator, EmptyIterator, GroupByIterator, ListIterator, MemoClosure.ProgressiveIterator, RangeExpression.RangeIterator, ReverseArrayIterator, SingletonIterator, SortedIterator

public interface LastPositionFinder
extends SequenceIterator

A LastPositionFinder is an interface implemented by any SequenceIterator that is able to return the position of the last item in the sequence.


Field Summary
 
Fields inherited from interface net.sf.saxon.om.SequenceIterator
ATOMIZABLE, GROUNDED, LAST_POSITION_FINDER, LOOKAHEAD
 
Method Summary
 int getLastPosition()
          Get the last position (that is, the number of items in the sequence).
 
Methods inherited from interface net.sf.saxon.om.SequenceIterator
current, getAnother, getProperties, next, position
 

Method Detail

getLastPosition

public int getLastPosition()
                    throws XPathException
Get the last position (that is, the number of items in the sequence). This method is non-destructive: it does not change the state of the iterator. The result is undefined if the next() method of the iterator has already returned null.

Throws:
XPathException